CVE-2026-42444

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a denial-of-service vulnerability exists in the littlefs filesystem image parser in NanaZip. The handler's Open method reads BlockCount directly from the attacker-controlled superblock without any validation against the actual file size or any upper-bound ceiling, then iterates BlockCount times, allocating a file-path entry per iteration. A crafted 44-byte littlefs image with BlockCount = 0xFFFFFFFF causes ~4 billion heap allocations, exhausting available memory. This vulnerability is fixed in 6.0.1698.0.

CVSS v3 3.3 LOW

3.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq	Mitigation Vendor Advisory
https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:*

History

18 May 2026, 13:24

Type	Values Removed	Values Added
CPE		cpe:2.3:a:m2team:nanazip::::::::
First Time		M2team M2team nanazip
References	~~() https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq -~~	() https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq - Mitigation, Vendor Advisory

14 May 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq -~~	() https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq -

12 May 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-12 20:16

Updated : 2026-05-18 14:17

NVD link : CVE-2026-42444

Mitre link : CVE-2026-42444

CVE.ORG link : CVE-2026-42444

JSON object : View

Products Affected

m2team

nanazip

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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